All- I have a 66 Mercury Colony Park with what I believe is a 67 or 68 ford 390 engine in it. I'm trying to find a replacement radiator, and cannot figure out where to get one that will work with the overflow tank on the car? Any ideas here? Most have the cap on the radiator - are there OEM replacements for the FE engine for this year? Or should I take out the overflow tank alltogether and just get an OEM radiator that works? Thanks for any help here you can provide.
You might try asking FrankenRodz: http://www.stationwagonforums.com/forums/showthread.php?t=16188 He has a 65 Colony Park (that he's been trying to sell) which has the overflow tank, and might be able to advise you further.
The only source for an OEM replacement radiator is MACs. I'm not sure if your radiator is flange or saddle mount, but they do have a variety. I would call them and talk directly, as the radiators cannot be returned. But first, what's wrong with your radiator that it cannot be repaired? Replacement is pretty radical... PM me to discuss further.
You'll find Macs Antique Auto Parts pretty much the "Holy Grail" for these cars. PMd you back. Glad I could help. Don't hesitate to contact me in the future with any other questions.